add gulp build for bower prep

Gulpfile.js

@@ -0,0 +1,14 @@
+'use strict';
+
+var gulp = require('gulp');
+var $ = require('gulp-load-plugins')();
+
+gulp.task('scripts', function () {
+  return gulp.src('./src/index.js')
+    .pipe($.browserify())
+    .pipe($.uglify())
+    .pipe($.rename('bitcoinjs-lib.min.js'))
+    .pipe(gulp.dest('./dist/'))
+});
+
+gulp.task('build', ['scripts']);

README.md

@@ -50,6 +50,14 @@ From the repo:
 
 ### Browser
 
+From Bower:
+
+    $ bower install bitcoinjs-lib
+
+then include in HTML
+
+    <script src="bower_components/bitcoinjs-lib/dist/bitcoinjs-lib.min.js"></script>    
+
 From the repository: Compile `bitcoinjs-min.js` with the following command:
 
     $ npm run-script compile

package.json

@@ -38,6 +38,11 @@
   "devDependencies": {
     "browserify": "^4.2.1",
     "coveralls": "~2.10.0",
+    "gulp": "^3.8.6",
+    "gulp-browserify": "^0.5.0",
+    "gulp-load-plugins": "^0.5.3",
+    "gulp-rename": "^1.2.0",
+    "gulp-uglify": "^0.3.1",
     "helloblock-js": "^0.2.1",
     "istanbul": "0.1.30",
     "jshint": "2.5.1",